NBA 2K10
50 Achievements
1,000
Xbox 360
5 Ranked Streak Trophy
Win 5 ranked matches in a row.
20
How to unlock the 5 Ranked Streak Trophy achievement in NBA 2K10 - Definitive Guide
This is done easiest with your boosting partner now that NBA 2k11 is out you can get this and the rest of the rank game achievements all at once just by quitting as many times as needed and playing the final game.